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Catalytic micro-electrolysis material and preparation method thereof

A micro-electrolysis and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of reduced effective contact area between filler and wastewater, reduced treatment effect, and easy agglomeration. Achieve the effect of easy industrial production, increase specific surface area, and increase strength

Active Publication Date: 2014-11-19
HUNAN BILAN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, a large number of experimental results show that there are still many defects in iron-carbon micro-electrolysis, which are manifested in: after a period of operation, a passivation film is formed on the surface of the filler, which is easy to agglomerate and channeling occurs, resulting in a decrease in the effective contact area between the filler and the wastewater , the processing effect is reduced

Method used

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  • Catalytic micro-electrolysis material and preparation method thereof
  • Catalytic micro-electrolysis material and preparation method thereof
  • Catalytic micro-electrolysis material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] see figure 1 As shown in the process flow diagram, iron powder with a particle size of less than 40 mesh, graphite powder with a particle size of less than 80 mesh, manganese dioxide with a particle size of less than 100 mesh, and catalyst CuCl with a particle size of less than 120 mesh 2 Be raw material, measure by weight percentage as follows: Iron powder: Graphite powder: Manganese dioxide: CuCl 2 =65%: 25%: 9.01%: 0.09%, put into the mixer and mix evenly, enter the granulator to granulate into Φ3~8mm or Φ8~20mm spherical particles. After drying, put it into a high-temperature furnace to isolate the air and heat it at 900°C-1200°C for 100-120min. After the material is roasted, it is cooled naturally to obtain CMEC.

[0048] The CMEC prepared by the above-mentioned examples is used to treat wastewater from a smelter, and its treatment process is as follows: figure 2 shown. The processing effect is as follows:

[0049]

[0050]

[0051] The comparison of Cu ...

Embodiment 2

[0053] Iron powder with a particle size of less than 40 mesh, graphite powder with a particle size of less than 80 mesh, manganese dioxide with a particle size of less than 100 mesh, and catalyst CuCl with a particle size of less than 120 mesh 2Be raw material, measure by weight percentage as follows: Iron powder: Graphite powder: Manganese dioxide: CuCl 2 =75%: 15%: 9.95%: 0.05%, put into the mixer and mix evenly, enter the granulator to granulate into Φ3~8mm or Φ8~20mm spherical particles. After drying, put it into a high-temperature furnace to isolate the air and heat it at 900°C-1200°C for 100-120min. After the material is roasted, it is cooled naturally to obtain CMEC.

[0054] The effect of using the CMEC prepared in Example 2 and the process to the wastewater treatment of a certain pigment factory is as follows:

[0055]

[0056] Comparison of COD concentration fluctuations before and after wastewater treatment in the above table Figure 7 shown.

Embodiment 3

[0058] Iron powder with a particle size of less than 40 mesh, graphite powder with a particle size of less than 80 mesh, manganese dioxide with a particle size of less than 100 mesh, and catalyst CuCl with a particle size of less than 120 mesh 2 Be raw material, measure by weight percentage as follows: Iron powder: Graphite powder: Manganese dioxide: CuCl 2 =85%: 7%: 7.99%: 0.01%, put into the mixer and mix evenly, enter the granulator to granulate into Φ3~8mm or Φ8~20mm spherical particles. After drying, put it into a high-temperature furnace to isolate the air and heat it at 900°C-1200°C for 100-120min. After the material is roasted, it is cooled naturally to obtain CMEC.

[0059] The effect of using the CMEC prepared in Example 3 and the process to treat As in the wastewater of a certain electroplating factory is as follows:

[0060] Detection data of heavy metal As in raw water and effluent water

[0061]

[0062] The concentration fluctuation comparison of As in the ...

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Abstract

The invention discloses a catalytic micro-electrolysis material used in treatments of heavy metal sewage and other wastewater, and a preparation method thereof. According to the invention, iron powder with a particle size smaller than 40 meshes and a weight percentage of 65-85%, graphite powder with a particle size smaller than 80 meshes and a weight percentage of 7-25%, manganese dioxide with a particle size smaller than 100 meshes and a weight percentage of 3-10%, and a catalyst with a particle size smaller than 120 meshes and a weight percentage of 0.01-0.09% are uniformly mixed; water is added, and the mixture is prepared into a granular material in a granulation machine; the material is naturally dried; and the material is heated while being isolated from air, such that the catalytic micro-electrolysis material is obtained. The catalytic micro-electrolysis material provided by the invention has high activity, high specific surface area, and galvanic cell and alkaline cell reaction effects. With the catalytic micro-electrolysis material, wastewater pH increase and electrolysis effect weakening can be effectively prevented, and material surface passivation and caking problems can be completely solved.

Description

technical field [0001] The invention belongs to the fields of environmental protection engineering and chemical industry, and in particular relates to a catalytic micro-electrolysis material for treating heavy metal sewage and other waste water and a preparation method thereof. Background technique [0002] Since the micro-electrolysis technology was introduced to my country in the 1980s, it has been widely used in the treatment of heavy metals, dyes, petrochemicals, pharmaceuticals, pesticides and other wastewater. Pretreatment of wastewater that is difficult to treat biologically, so as to realize the opening and chain breaking of organic pollutants, the removal of heavy metals, and improve the biodegradability of wastewater, which is beneficial to subsequent biological treatment. [0003] The iron-carbon micro-electrolysis process is used in the wastewater treatment process. After a period of operation, as the pH value continues to rise, the iron-carbon micro-electrolysis...

Claims

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Application Information

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IPC IPC(8): C02F1/461B01J27/10
Inventor 刘理方
Owner HUNAN BILAN ENVIRONMENTAL PROTECTION TECH CO LTD
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